docs: def add(self, *args, **kwargs):
          """ Add new mapping from args and kwargs
  
          >>> om = OperationIdMapping()
          >>> om.add(
          ...     OperationIdMapping(),
          ...     'aiohttp_apiset.swagger.operations',  # any module
          ...     getPets='mymod.handler',
          ...     getPet='mymod.get_pet',
          ... )
          >>> om['getPets']
          'mymod.handler'
  
          :param args: str, Mapping, module or obj
          :param kwargs: operationId='handler' or operationId=handler
          """
          for arg in args:
              if isinstance(arg, str):
                  self._operations.append(self._from_str(arg))
              else:
                  self._operations.append(arg)
          if kwargs:
              self._operations.append(kwargs)